/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.solr.response.transform;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import org.apache.solr.common.SolrDocument;
import org.apache.solr.request.SolrQueryRequest;

/**
 * Transform a document before it gets sent out
 * 
 * 
 */
public class DocTransformers extends DocTransformer {
	final List<DocTransformer> children = new ArrayList<DocTransformer>();

	@Override
	public String getName() {
		StringBuilder str = new StringBuilder();
		str.append("Transformers[");
		Iterator<DocTransformer> iter = children.iterator();
		while (iter.hasNext()) {
			str.append(iter.next().getName());
			if (iter.hasNext()) {
				str.append(",");
			}
		}
		str.append("]");
		return str.toString();
	}

	public void addTransformer(DocTransformer a) {
		children.add(a);
	}

	public int size() {
		return children.size();
	}

	public DocTransformer getTransformer(int idx) {
		return children.get(idx);
	}

	@Override
	public void setContext(TransformContext context) {
		for (DocTransformer a : children) {
			a.setContext(context);
		}
	}

	@Override
	public void transform(SolrDocument doc, int docid) throws IOException {
		for (DocTransformer a : children) {
			a.transform(doc, docid);
		}
	}
}
